elsevier science technology jun 2005 (3 Ergebnisse)

Buch. Zustand: Neu. Neuware - With the mapping of the partition function graphs of the n-vector magnetic model in the n to 0 limit as the self-avoiding walks, the conformational statistics of linear polymers was clearly understood in early seventies. Various models of disordered solids, percolation model in particular, were also established by late seventies. Subsequently, investigations on thestatistics of linear polymers or of self-avoiding walks in, say, porous medium or disordered lattices were started in early eighties. Inspite of the brilliant ideas forwarded and extensive studies made for the next two decades, the problem is not yet completely solved in its generality. This intriguing and important problem has remained since a topic of vigorous and active research. This book intends to offer the readers a first hand and extensive review of the various aspects of the problem, written by the experts in the respective fields. We hope, the contents of the book will provide a valuable guide for researchers in statistical physics of polymers and will surely induce further research and advances towards a complete understanding of the problem. First book on statistics of polymers in random media. Contents straight away from research labs. Chapters written by foremost experts in the respective fields. Theories, experiments and computer simulations extensively discussed. Includes latest developments in understanding related important topics like DNA unzipping, Travelling salesman problem, etc. Comprehensive index for quick search for keywords.

Buch. Zustand: Neu. Neuware - Exposure to space flight has been shown to results in changes in many physiological systems, including the musculoskeletal system, the cardiovascular system, the immune system, and the neurovestibular system. These changes could negatively impact the ability of humans to undertake long-term habitation and exploration of space. However, there are limits to the studies that can be done with humans in space. Both ground-based and space flight animal model systems are currently used for these studies as an alternative. This volume covers the latest developments in the use of animal models to study the effects of the space flight environment on human physiological systems. \* Includes unique insights into the mechanisms and the potential role of gravity, stress, radiation and other space flight environment factors on physiological systems\* A complete history back to the beginnings of space flight\* Discusses the development of countermeasures to prevent any damaging effects of the space flight environment on physiological systems.

Buch. Zustand: Neu. Neuware - Quantitation of Amino Acids and Amines by Chromatography: Methods and Protocols is intended to serve as a ready-to-use guide for the identification and quantification of amino acids and amines in various matrices, providing an overview on the theory and protocol of available methods. It presents chromatograms with exact elution programs enabling visual analysis and compares the advantages-disadvantages of various chromatographic techniques. In accordance with the chronological order of the development of chromatographic methods, different techniques are discussed: The possibilities of gas chromatography (GC), followed by those of the high performance liquid chromatography (HPLC) and the most recent techniques capillary electrophoresis (CE), capillary, electrochromatography (CEC).The characteristics of the given chromatographic procedure, relating to the topic in question, are classified according to the preliminary preparation/derivatization process(es), which means the simple methods, suitable for the analysis of the selected compound(s) in natural form, are followed by various derivatization proposals. Detailed protocols provide the reader with guidance in beginning tasks and on how to improve current methods. This book appeals to a wide audience and is recommended for those looking towards the wider reaches of identification and quantification of amino acids and amines. \* Provides a systematic, and comprehensive summary of chromatographic techniques and derivatization processes\* Compares advantages/disadvantages of various chromatographic techniques\* Readers can undertake practical tasks using detailed protocols given in the book.